This week the Pew Research Center (Pew) released a study which claimed more Mexicans returned to Mexico during 2009-2014 than came to the United States, a difference of 140,000. Its data came straight from US Census Bureau estimates for Mexican arrivals and the 2014 Mexican National Survey for Demographic Dynamics. Of course, it would be just about impossible to accurately count every individual traveling around North America under the proverbial radar, but it is an...